Bug 713277 - Use the default account if none is selected for the Account central pane and various cleanup. ui-r=bwinton, r=IanN, r=mbanner

c671975adf5f1d83b0c77cebb5ce42fc44f5ea14: Bug 747402 - Thunderbird comm-central failing to configure in libffi. This is due to a bug in picking the wrong compiler on the system (bug 748138), and specifying flags that are default and not needed to be specified now. Remove those default flags to get us going. rs=Callek NPOTB DONTBUILD

Bug 747402 - Thunderbird comm-central failing to configure in libffi. This is due to a bug in picking the wrong compiler on the system (bug 748138), and specifying flags that are default and not needed to be specified now. Remove those default flags to get us going. rs=Callek NPOTB DONTBUILD